Answer:
I might be wrong about some of these, but I think that the first one is 7/12. The second one is 14/24, and the last one is 14/72? There could be simplified variations, which is explained below.
Explanation:
For the first one I just counted the red blocks and put that as the numerator, and then counted all of the blocks including the red and white ones for the denominator. This came out to be 14/24, and then I simplified and got 7/12. It might be 14/24, but I don't know the options so I can't tell you for sure.
For the second one, I just multiplied straight across. 7 times 2 is 14 and 8 times 3 is 24. So, that's where I got 14/24 from. However, this answer could also be the simplified one, which is 7/12.
For the last one, I multiplied straight across as well. I used the fraction that I found for the second one. So, I did 7 times 2, which is 14 and 24 times 3, which is 72. The fraction would be 14/72, but the simplified version would be 7/36.